Yes, Common Privet is toxic to dogs!
Dogs accidentally consuming the Common Privet plants can show the following clinical symptoms: Vomiting, Prolonged Depression, Incoordination, Hypersalivaton, Sleepiness Or Excitation, Dilated Pupils, Low Body Temperature, Low Blood Pressure, Coma, Seizure And Death (In Rare Cases).
Common Privet consumption is also toxic to Cats and Horses.
Toxic Principles Of Common Privet: Cardiac glycosides, saponins, protoanemonin.
More Info About The Common Privet Plant
Scientific Name: Ligustrum vulgare
Family: Oleaceae.
Also known as: Privet, Amur, Wax-leaf.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.